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07-17-2018, 11:57 AM
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#1776
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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Looks like it goes as followed...
On the blue PCM connector-
Injector 1 = pin 36
Injector 3 = pin 3
Injector 5 = pin 76
injector 7 = pin 43
so at the injector connector for continuity test pin for the following..
Injector 1 = Black wire
Injector 3 = Pink & Black Wire
Injector 5 = Black & White Wire
Injector 7 = Red & black wire
ANDDD...
There are 2 fuses labeled INJ in the same fuse box as the starter relay and what not. They are not label which is which, but i will check both.
anyone wanna double check my pin out assumption ?
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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07-17-2018, 01:32 PM
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#1777
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Yes.
Yank a fuse, check for power at either bank. You have a 50/50 chance here
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-17-2018, 03:12 PM
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#1778
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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swung home on lunch and pulled the fuses. Both good.
Are injectors key on power? So id be able to test for power at the fuse
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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07-17-2018, 03:54 PM
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#1779
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^^^Lover of bad cars^^^ Meet Coordinator
Join Date: Aug 2007
Location: Whitehouse Station
Posts: 2,255
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Quote:
Originally Posted by LS1ow
swung home on lunch and pulled the fuses. Both good.
Are injectors key on power? So id be able to test for power at the fuse
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Should be. They are ground controlled so should have power with Key on engine off.
__________________
1986 Honda VFR750 - 89.3HP to the wheel
2000 Trans Am M6 - Mods: Yes.
2018 Durango R/T - AFE Intake, JLT Catch Can, Stainless Works Catback, Vinyl Dodge Racing Stripes
2003 Toyota Matrix XRS M6 - Lol
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07-17-2018, 04:01 PM
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#1780
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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Quote:
Originally Posted by ThoR294
Should be. They are ground controlled so should have power with Key on engine off.
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Okie, ill check that today as well.
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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07-17-2018, 04:28 PM
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#1781
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Power Member/NJFBOA Bookie/Moderator
Join Date: Jun 2009
Location: North Jersey = Best Jersey.
Posts: 4,435
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Nothing to helpful but just make sure you have the correct pcm pinout info for your pcm. I believe GM changed them for 99-02.
__________________
1995 Firebird... Stock-ish.
Quote:
Originally Posted by LS1ow
Good. He microwaved my phone 6 years ago, i hope his intake erupts.
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07-17-2018, 04:31 PM
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#1782
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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Quote:
Originally Posted by Jersey Mike
Nothing to helpful but just make sure you have the correct pcm pinout info for your pcm. I believe GM changed them for 99-02.
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__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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07-17-2018, 04:51 PM
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#1783
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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Here is current plan.
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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07-17-2018, 05:28 PM
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#1784
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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1) Make sure you have a power at each injector.
2) Check resistance across each injector (actual value is moot, just make sure their balanced)
3) Check continuity back to PCM (Personally I would snag a noid light and just see if PCM signal is getting to injector while cranking/running)
4) Swap banks of injectors and see if problem follows.
5) Cry, drive car into swamp, buy a real LT1 car
6) Success
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-17-2018, 06:38 PM
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#1785
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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Wait, did you verify spark and compression on the questionable side yet? Fuel, air, and spark are needed obviously so we have to see what is missing.
The pink wire is hot with "Ignition Relay Energized" so if you have power on the one bank, you should have power on the other. As said, all the grounds run back to pcm. Post pics when you find they are all fukt
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07-17-2018, 06:46 PM
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#1786
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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Quote:
Originally Posted by sweetbmxrider
Wait, did you verify spark and compression on the questionable side yet? Fuel, air, and spark are needed obviously so we have to see what is missing.
The pink wire is hot with "Ignition Relay Energized" so if you have power on the one bank, you should have power on the other. As said, all the grounds run back to pcm. Post pics when you find they are all fukt
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Compression and spark verified.
So the PCM grounds the injector to get them to fire?
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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07-17-2018, 07:53 PM
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#1787
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Quote:
Originally Posted by LS1ow
Compression and spark verified.
So the PCM grounds the injector to get them to fire?
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Yes
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-17-2018, 08:18 PM
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#1788
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^^^Lover of bad cars^^^ Meet Coordinator
Join Date: Aug 2007
Location: Whitehouse Station
Posts: 2,255
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^. Most if not all FIs are ground controlled. Some just fire 4 (or 1 bank) at a time (lol 93s fbodies with bank injection).
Noid light is a great idea too makes testing easy.
__________________
1986 Honda VFR750 - 89.3HP to the wheel
2000 Trans Am M6 - Mods: Yes.
2018 Durango R/T - AFE Intake, JLT Catch Can, Stainless Works Catback, Vinyl Dodge Racing Stripes
2003 Toyota Matrix XRS M6 - Lol
Last edited by ThoR294; 07-17-2018 at 08:27 PM.
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07-18-2018, 07:07 AM
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#1789
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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Here was my findings. Im not sure if i did it right so keep with me, but this is what made sense to me.
Do not currently have a noid light.
1. After verifying the 2 injector fuses were good, i checked to make sure the fuse itself was seeing power. Indeed it is. On to the next.
Everything from here on was done with battery cut off switch off...
2. Checked continuity between PCM connector and injector plug on all 8 injectors, good to go.
3. I wasnt sure how to check for power at each injector, since i was by myself i couldnt crank and watch meter. So with the PCM plugged back in, i stuck the positive pin of the ohm meter in the pink wire terminal, and black to a ground block and it has continuity.
EDIT: If the PCM causes the injector to fire by completing the ground when it is signaled, do the injectors constantly how power while keyed on?
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
Last edited by LS1ow; 07-18-2018 at 07:28 AM.
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07-18-2018, 07:09 AM
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#1790
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Cranking has nothing to do with power at injectors.
Car on, and you should have 12v at each injector pink wire.
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-18-2018, 07:33 AM
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#1791
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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Quote:
Originally Posted by LTb1ow
Cranking has nothing to do with power at injectors.
Car on, and you should have 12v at each injector pink wire.
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Will check today on lunch.
So lets say i do have power at all the injectors, that combined with the other info we've already compiled would point to a failed injector driver in the pcm?
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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07-18-2018, 07:53 AM
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#1792
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Quote:
Originally Posted by LS1ow
Will check today on lunch.
So lets say i do have power at all the injectors, that combined with the other info we've already compiled would point to a failed injector driver in the pcm?
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Or a unplugged PCM connector.
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-18-2018, 09:52 AM
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#1793
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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Quote:
Originally Posted by LTb1ow
Or a unplugged PCM connector.
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Not sure how possibru since it bolts in doe
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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07-18-2018, 10:00 AM
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#1794
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Quote:
Originally Posted by LS1ow
Not sure how possibru since it bolts in doe
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Are you now doubting me doubting you?
Doubtful.
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-18-2018, 10:03 AM
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#1795
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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I actually made sure to check they slid into each other smoothly bc you had me paranoid.
Can test injector power with just test light right? Key on with test light clipped to ground, pin pink wire should result in dat light
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
Last edited by LS1ow; 07-18-2018 at 10:04 AM.
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07-18-2018, 10:23 AM
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#1796
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Correct.
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-18-2018, 10:42 AM
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#1797
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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Results within next 2 hours
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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07-18-2018, 01:18 PM
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#1798
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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OKAY SO.
Conundrum.
Test light i grabbed from work was 1 with 2 leads on it. Since batt is in trunk and couldnt connect, connected neg to ground stud on driver shock tower, posi connected to stud on fuse box. Battery on.
Each pink injector wire, on all 8, light the light up green. According to the instructions for the test light, a green LED means they are grounded.
da fuq
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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07-18-2018, 01:23 PM
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#1799
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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You prob nicked the harness or something
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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07-18-2018, 01:57 PM
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#1800
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Power Member / trans break does not equal transbrake
Join Date: May 2009
Location: The Meadowlands
Posts: 4,513
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Quote:
Originally Posted by LTb1ow
You prob nicked the harness or something
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As in theres a cut or something somewhere so it’s grounding itself?
__________________
99 Z28 - SBE LS1/60e
Motor - 10.84 @ 128 - 1.47 60'
Nitrous - 10.16 @ 132 - 1.40 60"
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